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Research on Heat Transfer Performance of Micro-Channel Backplane Heat Pipe Air Conditioning System in Data Center

1
Hunan Engineering Research Center of Energy Saving and material Technology of Green and Low Carbon Building, Hunan Institute of Engineering, Xiangtan 411104, China
2
College of Civil Engineering, Hunan University, Changsha, Hunan 410082, China
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(2), 583; https://doi.org/10.3390/app10020583
Received: 10 December 2019 / Revised: 6 January 2020 / Accepted: 8 January 2020 / Published: 13 January 2020
(This article belongs to the Special Issue Sciences and Innovations in Heat Pump/Refrigeration)
This paper deals with the heat transfer performance of a micro-channel backplane heat pipe air conditioning system. The optimal range of the filling rate of a micro-channel backplane heat pipe air conditioning system was determined in the range of 65–75%, almost free from the interference of working conditions. Then, the influence of temperature and air volume flow rate on the heat exchange system were studied. The system maximum heat exchange is 7000–8000 W, and the temperature difference between the inlet and outlet of the evaporator and the condenser is almost 0 °C. Under the optimum refrigerant filling rate, the heat transfer of the micro-channel heat pipe backplane system is approximately linear with the temperature difference between the inlet air temperature of the evaporator and the cooling distribution unit (CDU) inlet water temperature in the range of 18–28 °C. The last part compares the heat transfer characteristics of two refrigerants at different filling rates. The heat transfer, pressure, and refrigerant temperature of R134a and R22 are the same with the change of filling rate, but the heat transfer of R134a is lower than that of R22. The results are of great significance for the operational control and practical application of a backplane heat pipe system. View Full-Text
Keywords: micro-channel; backplane heat pipe; optimal filling rate; heat transfer performance micro-channel; backplane heat pipe; optimal filling rate; heat transfer performance
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Zeng, L.; Liu, X.; Zhang, Q.; Yi, J.; Liu, X.; Su, H. Research on Heat Transfer Performance of Micro-Channel Backplane Heat Pipe Air Conditioning System in Data Center. Appl. Sci. 2020, 10, 583.

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